Metal construction.



W. P. LAWRENCE. METAL ooNsrrRuc'rIoN.

APPLICATION FILED JUNE l5, 1908.

Patented May 25, 1909.

` 'Lw/messes A ff af Arron/vus yit(` h'iioivnf :that vl; ILLIAM I P. LAW- lznnen,"a"eitizen'or the United States, and a 'residentof Colorado Springs, in the countyv oflfPaso'faiid,State' of Colorado, have invented"ifi'eiv'y 'andfuseful Improvements -in Metal Construction, of which lthe folldwing is-a ltullgcleal, and exact description.

4sheet metal tubular member, but at the same time| permit of their being readily ltaken apart if occasion demands.

, leferenee is to be had to the accompany ing drawings, forming a part of this specification, in which similar characters of reifereuce indicate Corresponding paits in all the figures, and in Which-e Figure l is a' perspective vieuT of an upright having tivo r'ails securedthereto; Fig. 2 is a transverse sectionv on the line 2-2 of Fig. l; and Fig. 3 is a longitudinal section on the line of Fig. l.

In the specific form illustrated, l. employ an upright l0 constructed of sheet metal and substantially.tubular in form.

ihe upright muy be of any desired ornamental oontiguration, but is illustrated herein as being' rectangular sind having three sides thereof formed ot' one piece of sheet'metal und the -t'ourth side ll beaded or seamed thereto. l have illustrated two different forms of rails l2 and 13, the former beingl circular in cross section and ythe lutter being in the- 'torm or' an inverted U. The 'tuluilar rail' l2 is secured to the tubulary upright 10 by means oi" a tongue 1+i and a key l5. rilhe tongue eX- tends into the end of thereil l2 and is pro -vided With outwardly-extending i'lunges or, shoulders 16 Whieh litinto recesses in the end otl the ruil, to limit .the inward move ment of the Itongue in respect to the rail and also prevent lateral movement of said tongue. rillhe tono'ue 1s held in place by a transverse pin l? driven through an aperp neetei'siratent. .n 'eli frees' seria-rnb. resent nre errer einen.' vv'iLLnnu P,f LAWRENGE, or Acotone;iidsrrunes, v oonoeano.

r v, l fstnfrni.- oonsrnuefrron.

raten- Iseyes, ieee.

l .ture'in y.the tongue and inthe sides of. the

rail. The pin 17 vmuy be slightly wedge shaped,'so as to draw the tongue into posi'- tion and hold itrigid in respectto'th'e rail. The end of thel tongue extends beyond the rail and is adapted for insertion lwithin a slot intheiside of the upright. Theportion of the tongue` Within the uprightV is pro- .vided with `a slot through which the Wedgshaped 'key l5 'may be driven to hold the anges or shoulders 16 andthe ends of the y rail in rnrengagement with the side of the upright.v y l The means for fastening the tubulary rail 13 to 'the upright may bel the same asthat employed for 'fastening the rail 12 in position, but l have illustrated a slightly 4(litter-'- ent construction. lIn this forlmthe tongue lila instead of being held Within the rail by a pin extending through an aperture in the tongue, is provided with a hookend 11S, which engages with a' transverse pin 17a.

rlyhis pin, as shown in Fig. 2, may be slightly Wedgjoshalped, so as to draw the shoulders 16a of the tongue intoengagement with the recesses in the end of the rail, and the end oi the key may be ,riveted to prevent it freinl Workirrg` loose. T he inner end 'of the tongue letEL is the same as the inner end of. the tongue 14, the same Wedge or key member 14S-being employed to draw it into position and pre-- vent its return movement. As Will be noted, the tongue in both forms extends into the end oi the upright, and is held against iengitudinal movement in one.' direction by its shoulders, and against ylongitudinal movement in the other direction by the transverse key. ln each instance, the tongue extends through an aperture in the Wall of the tubu hir member' l0 and is held there by la Wedgeor key. y

Having thus described my invention., 'l claim as new and desire to secure by Letters Patent:

l. In Combination, a tubular sheet. metal upright, a sheet metal rail having an end thereof in engagement with the side of upright, a sheet metal tongue extending into the end of said ruil und through an aperture l. E'

in the side oit' suid upright, a piu extending transversely oi'. said ruil and in engagement- With, said tongue orrigg'idly securing said` il (i said first-mentioned' membe 'godinen'gagethrough said; A

Saud tongue fot'holdmg the tongue and m11 x?xgld;v .111 respect.

'tongue hfing' lee'sseS 1n; the sl'des of smd rall rail 'and in engagement twith J each other, ,sl'd tongue o evi'ng An-testimony 'whereof have sgnec Tny f two' subsrbng Witnesses.l

LAWRENCE.

WILLIAM' Witnesses: 4

'MATTHEW KENNEDY,

Trios; C; PEASE.,

Shoulders? extending ito' ref adppent the n. .nA transXfelSe pm. extendmg 

